预润湿对管道润湿性的影响

针对成品油管道的内腐蚀问题，通过测量有机玻璃和钢材表面的接触角，对无机盐离子、表面粗糙度及润湿历史在油水固三相体系中的作用进行了研究。实验结果显示：碳钢具有憎油性，有机玻璃具有憎水性。在两种材料表面，预润湿的一相均表现出阻碍另一相润湿固体表面的倾向；离子浓度的增加提高了固体表面的憎油性，以上两种现象在碳钢表面表现的更为明显。此外，固体材料既影响最终的润湿接触角，也影响液体在固体表面的润湿进程，碳钢表面润湿稳定所需的时间远远大于有机玻璃表面润湿所需的时间，该现象会对含水输油管道中腐蚀位置的分布产生影响。

Effect of Pre-Wetting on Pipeline Wettability

In view of the problem of oil pipeline inner wall corrosion, by the measurement of the contact angle of acrylic and steel surface, we carried out to study the effect of inorganic salt icon, solid surface roughness and pre-wetting history on oil-water-solid system. The results indicate that the carbon steel mainly appears hydrophilic, while the acrylic mainly appears hydrophobic. On the surface of both materials, the pre-wetting phase always inclines to prevent the solid surface wetted by another phase, and the increasing icon concentration enhances the hydrophilic of the solid surface. Both of the phenomena are more obvious on the carbon steel surface. What is more, pipeline material affects not only the final contact angle, but also the wetting process, which shows that wetting requires much longer time to reach balance on the carbon steel than on the acrylic surface, which may exert an effect on the distribution of corrosion in the pipeline.